Ball of light low in sky descending slowly at steep angle from East to West

At approximately 9:00-9:30 pm, i was looking out a south facing window and witnessed a ball of light descending across my field of view from East to West. The light appeared too large, moved at a rate to quickly, and angle to steep for it to be an airplane. It also moved to slowly for it to seem like a shooting star. It did not leave a trail. The path of the object was linear and did not vary, and descended from east to west at an angle of approx. 30 degrees. The light from the object seemed very white. I only witnessed it for a period of less than 5 seconds before my view was obstructed.